Yep it will all end very suddenly.
Aerie will say I am speaking to and not to Jaheira. Jaheira will sulk and ignore all that passes between you and Aerie.
You should also keep saying how beautiful Aerie is and how all men like her.

Aeire and Jaheria were having an arguement and Aeire insulted Jaheria and said I loved her. Jaheria told me to let her down gently, and i liked kahlid from Bg1, the best fighter in the game and told Aeire I liked Kalhid. Aeire thought that I was being cruel and left my party no saying where she was going. She just said "I have to go now,"and ran of